Qpopper

Qpopper is one of the oldest and most popular server implementation of POP3. As a free and open-source server distributed under BSD style license, it has been a common choice for Internet Service Providers, schools, corporations, and other organizations. It is included in several Linux and Unix distributions.

Qpopper is distributed by Qualcomm as source code; other parties offer pre-compiled or pre-configured versions for various platforms.

Qpopper runs on a wide variety of platforms, including virtually all Unix and Linux distribution, MacOS X, and even Windows under cygwin.

Qpopper is generally recognized as fast, stable, and secure. It is most commonly used with standard Unix mbox format inboxes (or "spools") but also supports homedir mail. Because mbox is a linear format in which messages are stored sequentially, Qpopper supports a number of optimizations to improve speed and scalability, including a cache file to maintain mailbox state between sessions, and several optional I/O techniques.

History

Qpopper is the result of the work of many individuals and organizations around the world. The original development was done around 1989 at UC Berkeley and was called "popper". Qualcomm agreed to take over the project when it decided to distribute the Eudora mail client.

References

• Qpopper home page
• Qpopper entry on freshmeat